Ncert-class 11-chemistry – unit 8-Organic Chemistry – Some Basic Principles and Techniques Welcome to your Ncert-class 11-chemistry - unit 8-Organic Chemistry – Some Basic Principles and Techniques 1. The trends in physical properties of compounds within a homologous series are due to: Both change in size and change in weight functional group change in weight change in size None 2. Which term is the best match for the color of a chemical substance students make note of: inference observation qualitative data quantitative data None 3. Which one of these shows least -I effect: $$-F$$ $$-NO_{2}$$ $$-OH_{2}^{+}$$ $$-NH_{3}^{+}$$ None 4. In the detection test of carbon and hydrogen with cupric oxide, hydrogen is oxidized to __________. water methane lime water hydride None 5. Among the following which has greatest -I effect? -NO2 -NH2 -F -OH None 6. In which of the following case does withdrawing effect dominates donating effect? -NHCH3 -Cl -OCH3 -OH None 7. Groups that can show both +M and -M effect: -NO phenyl vinyl All of these None 8. The compound of the molecular formula, $$C_{6}H_{14} $$has two tertiary carbons. Its IUPAC name is: 2 , 3 −dimethylbutane 2 − methylpentane 2 , 2 −dimethylpentane n-hexane None 9. Carbon present in the compounds is oxidised to carbon dioxide which: turns lime water milky turns solution to green has no effect on solution turns blue litmus red None 10. Carbon and hydrogen are detected by heating the organic compound with ________. cupric oxide sulphur dioxide magnesium oxide zinc oxide None 11. In which of the following inductive effect is possible: Cyclohexane Butanal Benzene Butane None 12. Which of the following is a characteristic of homologous series? All the members have same functional group All the members show different chemical properties All the members can be represented by same general formula Both All the members can be represented by same general formula and All the members have same functional group None 13. Group showing strongest +M effect:$$-O^{-}$$ $$-N(CH_{3})_{2}$$ $$-NH_{2}$$ $$-NHCH_{3}$$ $$-O^{-}$$ None 14. 2𝐻+𝐶𝑢𝑂→𝑋+𝑌2The compound 𝑋X and 𝑌Y are: H_{2},Cu None $$H_{2}O,Cu$$ $$H_{2},CuO$$ Both None 15. The order of -I effect of orbitals is: 𝑠𝑝³>𝑠𝑝²>𝑠𝑝 𝑠𝑝² >𝑠𝑝³>𝑠𝑝 𝑠𝑝>𝑠𝑝² >𝑠𝑝³ 𝑠𝑝² >𝑠𝑝>𝑠𝑝³ None 16. Which of the following is the best evidence for the validity of a proposed reaction mechanism? Reaction rate data suggests that the rate of the reaction is approximately what is expected. An experimenter found spectrophotmetric data consistent with the presence of a reaction intermediate in the proposed mechanism. The product proposed by the mechanism was formed. The same mass of catalyst is present at the end of the reaction as it was at the beginning. None 17. Homologous series is____________. a series of compounds with same molecular formula and different structural formulae. a series of compounds in which different functional group substitutes for hydrogen in a carbon chain. a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain. a series of compounds with same molecular formula but different functional groups. None 18. In the detection test of carbon and hydrogen with cupric oxide, carbon is oxidized to : copper sulphate carbon monoxide carbonic acid carbon dioxide None 19. The most common characteristics of homologous series is increase in the number of: methyl units methylene units propyl units butyl units None 20. Given two compounds, one more polar than the other, which one will move up the silica stationery phase higher than the other in TLC? Non polar compound None will move Both will move equally Polar compound None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
